Two kids on a leftward moving sled are slowing down as they glide across a level patch of tightly packed snow at the bottom of the hill. Which of the following free body diagrams best describe the forces acting on them and the sled?

This free body diagram shows the forces acting on a skydiver a few seconds after they jump out an airplane. What is the net force acting on the skydiver?

From the diagram, what is the mass of the parachuteer?

A man drags a 75kg box in a straight line across the floor at a steady speed of 0.40 m/s. What is true about the horizontal forces acting in this scenario.

The engines of a model rocket provide 12 N of upward thrust. If the net force on the rocket is 4 N upwards, how large is the gravitational force. (ignore air resistance)

Refer to the diagram. What is the acceleration of the object?

The FBD shows the forces as it is being pulled to the right. The FBD tells that the frictional force is

A hockey puck has a coefficient of friction of μk = .10. If the puck feels a normal force (F_N) of 5 N, what is the frictional force that acts on the puck?

A rightward force of 302 N is applied to a 28.6 kg crate to accelerate it across the floor. The coefficient of friction between the crate and the floor is 0.750. Determine the acceleration of the crate. (Take g = 9.80m/s^2)

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration? (F_net=ma)

What is the force of friction between a block of wood that weighs 350 N and the ground if μ = .12?

What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 76 N?

The diagram shows forces acting on the mass. What is the coefficient of friction?

From the diagram, what is the acceleration of the mass?

The symbol µ stands for

Liza has just moved into a new apartment. She has enlisted her brother Ron to help her with moving her furniture into place. In the apartment, the floors have two different surfaces. The entrance into the apartment is a smooth hardwood floor. Entering the living room, the floor becomes carpeted. The first large piece of furniture moved into the apartment is a large couch with a mass of 115 kg. Liza and brother applies a force of 115 N. Is the force enough to move the couch?

A rightward force is applied to a 10-kg object to move it across a rough surface at constant velocity. The coefficient of friction between the object and the surface is 0.20. (g=9.80m/s/s. Neglect air resistance.) How much is the applied force?

A rightward force is applied to a 5-kg object to move it across a rough surface with a rightward acceleration of 2.00 m/s/s. The coefficient of friction between the object and the surface is 0.10. How much is the net force?

A rightward force is applied to a 5-kg object to move it across a rough surface with a rightward acceleration of 2.00 m/s/s. The coefficient of friction between the object and the surface is 0.10. How much force was applied to cause that acceleration? (Neglect air resistance.)